/*
 * Copyright 2010-2020 Alfresco Software, Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.activiti.engine.impl.persistence.entity;

import static java.util.Collections.emptyList;

import java.util.List;
import java.util.Map;

import org.activiti.engine.history.HistoricProcessInstance;
import org.activiti.engine.impl.HistoricProcessInstanceQueryImpl;
import org.activiti.engine.impl.cfg.ProcessEngineConfigurationImpl;
import org.activiti.engine.impl.persistence.entity.data.DataManager;
import org.activiti.engine.impl.persistence.entity.data.HistoricProcessInstanceDataManager;

/**
 */
public class HistoricProcessInstanceEntityManagerImpl extends AbstractEntityManager<HistoricProcessInstanceEntity> implements HistoricProcessInstanceEntityManager {

	protected HistoricProcessInstanceDataManager historicProcessInstanceDataManager;

	public HistoricProcessInstanceEntityManagerImpl(ProcessEngineConfigurationImpl processEngineConfiguration, HistoricProcessInstanceDataManager historicProcessInstanceDataManager) {
		super(processEngineConfiguration);
		this.historicProcessInstanceDataManager = historicProcessInstanceDataManager;
	}

	@Override
	protected DataManager<HistoricProcessInstanceEntity> getDataManager() {
		return historicProcessInstanceDataManager;
	}

	@Override
	public HistoricProcessInstanceEntity create(ExecutionEntity processInstanceExecutionEntity) {
		return historicProcessInstanceDataManager.create(processInstanceExecutionEntity);
	}

	@Override
	public void deleteHistoricProcessInstanceByProcessDefinitionId(String processDefinitionId) {
		if (getHistoryManager().isHistoryEnabled()) {
			List<String> historicProcessInstanceIds = historicProcessInstanceDataManager.findHistoricProcessInstanceIdsByProcessDefinitionId(processDefinitionId);
			for (String historicProcessInstanceId : historicProcessInstanceIds) {
				delete(historicProcessInstanceId);
			}
		}
	}

	@Override
	public void delete(String historicProcessInstanceId) {
		if (getHistoryManager().isHistoryEnabled()) {
			HistoricProcessInstanceEntity historicProcessInstance = findById(historicProcessInstanceId);

			getHistoricDetailEntityManager().deleteHistoricDetailsByProcessInstanceId(historicProcessInstanceId);
			getHistoricVariableInstanceEntityManager().deleteHistoricVariableInstanceByProcessInstanceId(historicProcessInstanceId);
			getHistoricActivityInstanceEntityManager().deleteHistoricActivityInstancesByProcessInstanceId(historicProcessInstanceId);
			getHistoricTaskInstanceEntityManager().deleteHistoricTaskInstancesByProcessInstanceId(historicProcessInstanceId);
			getHistoricIdentityLinkEntityManager().deleteHistoricIdentityLinksByProcInstance(historicProcessInstanceId);
			getCommentEntityManager().deleteCommentsByProcessInstanceId(historicProcessInstanceId);

			delete(historicProcessInstance, false);

			// Also delete any sub-processes that may be active (ACT-821)

			List<HistoricProcessInstanceEntity> selectList = historicProcessInstanceDataManager.findHistoricProcessInstancesBySuperProcessInstanceId(historicProcessInstanceId);
			for (HistoricProcessInstanceEntity child : selectList) {
				delete(child.getId()); // NEEDS to be by id, to come again through this method!
			}
		}
	}

	@Override
	public long findHistoricProcessInstanceCountByQueryCriteria(HistoricProcessInstanceQueryImpl historicProcessInstanceQuery) {
		if (getHistoryManager().isHistoryEnabled()) {
			return historicProcessInstanceDataManager.findHistoricProcessInstanceCountByQueryCriteria(historicProcessInstanceQuery);
		}
		return 0;
	}

	@Override
	@SuppressWarnings("unchecked")
	public List<HistoricProcessInstance> findHistoricProcessInstancesByQueryCriteria(
			HistoricProcessInstanceQueryImpl historicProcessInstanceQuery) {
		if (getHistoryManager().isHistoryEnabled()) {
			return historicProcessInstanceDataManager
					.findHistoricProcessInstancesByQueryCriteria(historicProcessInstanceQuery);
		}
		return emptyList();
	}

	@Override
	@SuppressWarnings("unchecked")
	public List<HistoricProcessInstance> findHistoricProcessInstancesAndVariablesByQueryCriteria(HistoricProcessInstanceQueryImpl historicProcessInstanceQuery) {
		if (getHistoryManager().isHistoryEnabled()) {
			return historicProcessInstanceDataManager.findHistoricProcessInstancesAndVariablesByQueryCriteria(historicProcessInstanceQuery);
		}
		return emptyList();
	}

	@Override
	public List<HistoricProcessInstance> findHistoricProcessInstancesByNativeQuery(Map<String, Object> parameterMap, int firstResult, int maxResults) {
		return historicProcessInstanceDataManager.findHistoricProcessInstancesByNativeQuery(parameterMap, firstResult, maxResults);
	}

	@Override
	public long findHistoricProcessInstanceCountByNativeQuery(Map<String, Object> parameterMap) {
		return historicProcessInstanceDataManager.findHistoricProcessInstanceCountByNativeQuery(parameterMap);
	}

	public HistoricProcessInstanceDataManager getHistoricProcessInstanceDataManager() {
		return historicProcessInstanceDataManager;
	}

	public void setHistoricProcessInstanceDataManager(HistoricProcessInstanceDataManager historicProcessInstanceDataManager) {
		this.historicProcessInstanceDataManager = historicProcessInstanceDataManager;
	}

}
